Gosh, so much easier with an old one.
1/ Drain coolant (if water cooled). Nice tap provided!
2/ Remove water pipes if fitted
3/ Disconnect fuel pipe
4/ Disconnect and remove oil pipe(s)
5/ Disconnect control cables from carburettor (easy way is to take carb apart).
6/ Remove control cable from magneto
7/ Remove shorting wire from magneto
8/ Remove exhausts
9/ Remove the four engine bolts (it won't fall, chassis will hold it)
At this point the engine is free and can be moved far enough forward to access many clutch bits but if there are two of you, enough man-power to remove engine pretty easily (if you are butch, you might do it on your own). Or pretty easy to remove with a hoist.
Set up near the bottom on
this page on my website.
If everything is free (often is on a two or three speeder, they are very oily) you ought to be able to do a clutch job on your own in a morning. And if you are a racer, much less!